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Rang Dong makes 450-ml glass lined vacuum flask thermos for personal use

October 2nd, 2023

People tied to hard work or to extensive sports training may face the risk of dehydration. Fully aware of the demand to supplement water to strengthen the body performance, Rang Dong has developed a vacuum flask thermos capable of storing 450 ml of water. The new model of the glass lined flask equipped with a carrier will be the best personal assistant in many activities. Let’s figure out what is special about this product in the following article.


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Parts of Rang Dong’s 450-ml glass lined vacuum flask thermos with carrier.

Rang Dong’s glass lined vacuum flask thermos, model RD 04528 N2, comes with a three-color option: pink, purple and dark blue, all of which are well in line with modern style. The body cover is made of food-grade Acrylonitrile Butadiene Styrene (ABS) or Polypropylene (PP). The inside glass refill is made from high-quality materials, suitable for keeping our drinks.

The lid of this thermos can be used as an instant cup. The inside white lid has a silicone gasket attached, which makes the mouth sealed and prevents leakage. If we turn the flask upside down with water inside, water won’t drop out thanks to this gasket.

The base under the flask can be easily disassembled by a twist-off action, followed by removing the glass refill for cleaning. Rang Dong has attached a small carrier for RD 04528 N2, allowing it to be hung anywhere or taken along without being slippery.

Exceptional features

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Rang Dong’s vacuum flask, model RD 04528 N2, can retain hot liquid for up to six hours.

This thermos can keep the heat thanks to the glass refill. With 60 years of experience making the glass, Rang Dong has given the thermos the ability to ensure the temperature of a hot drink stay at more than 70 degree Celsius after six hours, while a cold drink lasts for 24 hours. It will be quite handy for an outgoing trip on a winter day to have hot coffee or hot tea ready along. An instant cold drink will also certainly do on a hot summer day.

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Rang Dong’s RD 04528 N2 is capable of keeping a cold drink cold for up to 24 hours.

The other advantage of glass refill is that it keeps unchanged our drink flavor, especially juice, milk, herbal tea and coffee, unlike some other types of vacuum flasks, the inside part of which is made of low-quality stainless steel so it changes the drink flavor and makes it harmful to our health.

The size of RD 04528 N2 is ø86.5 x 200 (mm), making it small enough to put in the backpack’s side pocket for water bottle, the water case on our bike or the box in the car. It contains a maximum 450 ml of liquid so it’s not too heavy for carrying around.

User’s guidance

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Rang Dong’s RD 04528 N2 is designed for personal use and can be taken along for outdoor activities.

This vacuum flask thermos is for personal use so everyone could use it: kids going to school, hanging out with friends; adults bringing it to work, to gym or jogging in the park etc. This thermos is the best to store coffee, milk or tea, either hot or cold. For a cold drink, be careful when we put ice cubes into the flask because the glass refill is fragile. We’d better pour cold drinks in, instead of placing ice cubes.

The hardest part to clean is the glass refill. But once we know how to do it right, it’s easy. One tip is to use warm water mixed with vinegar. Fill it up fully and leave the mixture overnight or longer if the stains are hard to remove. The next day we’ll see the difference.

Rang Dong is Vietnam’s biggest vacuum flask manufacturer, having been certified with ISO 9001:2015, ISO 14001:2015 and ISO 50001:20015. The Hanoi-based company’s products have been exported to 40 countries on a long stretch from Asia to Europe to South America.

Should you have any questions, wish to share your ideas about vacuum flasks or request a quotation, please send us an email to: export@rangdong.com.vn.

Our website: vacuumflask.rangdong.com.vn

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